148 lines
5.3 KiB
C#
148 lines
5.3 KiB
C#
/*----------------------------------------------------------------
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// 多 RawImage + 多 Decoder、同时只播一路时：共用一份 UI 材质，仅当前激活 Decoder 写贴图与参数。
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//----------------------------------------------------------------*/
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using UnityEngine;
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/// <summary>
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/// 与多个 <see cref="LeviathanVideoDecoder"/> 配合：全组共用<strong>一个</strong> <see cref="Material"/> 实例，
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/// 任意时刻只有 <see cref="ActivateDecoder"/> 指定的那一路会把它赋到自己的 RawImage 并更新 Y/U/V。
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/// 要求：各解码器的 <see cref="LeviathanVideoDecoderBase.AlphaType"/> 与控制器上配置的 Shared Alpha Type 一致（同一套 Shader）。
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/// </summary>
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public class LeviathanVideoSharedMaterialController : MonoBehaviour
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{
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private static Shader FindShaderForAlphaType(LeviathanVideoDecoderBase.PlayAlphaType alphaType)
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{
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string name = alphaType switch
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{
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LeviathanVideoDecoderBase.PlayAlphaType.RightSide => "LeviathanVideo/YUV420P_Alpha_Right",
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LeviathanVideoDecoderBase.PlayAlphaType.BottomSide => "LeviathanVideo/YUV420P_Alpha_Bottom",
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LeviathanVideoDecoderBase.PlayAlphaType.ChromaKey => "LeviathanVideo/YUV420P_ChromaKey",
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_ => "LeviathanVideo/YUV420P",
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};
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return Shader.Find(name);
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}
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[SerializeField]
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[Tooltip("共用材质使用的 Alpha/Shader 类型，须与各 Decoder 的 Alpha Type 一致")]
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private LeviathanVideoDecoderBase.PlayAlphaType _sharedAlphaType = LeviathanVideoDecoderBase.PlayAlphaType.ChromaKey;
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[SerializeField]
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[Tooltip("可选：用工程里的材质做模板 Instantiate；为空则按 Shared Alpha Type 从 Shader 创建")]
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private Material _materialTemplate;
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private Material _sharedMaterial;
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private LeviathanVideoDecoder _activeDecoder;
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/// <summary>当前独占共用材质的解码器；无则为 null。</summary>
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public LeviathanVideoDecoder ActiveDecoder => _activeDecoder;
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/// <summary>共用材质实例（只读，勿在外部 Dispose）。</summary>
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public Material SharedMaterial
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{
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get
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{
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EnsureSharedMaterial();
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return _sharedMaterial;
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}
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}
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private void EnsureSharedMaterial()
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{
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if (_sharedMaterial != null)
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return;
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if (_materialTemplate != null)
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{
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_sharedMaterial = new Material(_materialTemplate);
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return;
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}
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var sh = FindShaderForAlphaType(_sharedAlphaType);
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if (sh == null)
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{
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LeviathanLogConfig.LogError(nameof(LeviathanVideoSharedMaterialController),
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$"无法创建共用材质：Shader 未找到（AlphaType={_sharedAlphaType}）");
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return;
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}
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_sharedMaterial = new Material(sh);
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}
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/// <summary>
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/// 将共用材质交给指定解码器；可选停止上一路。
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/// </summary>
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/// <param name="decoder">若为 null，则仅解绑当前路并清空激活项</param>
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/// <param name="stopPreviousDecoder">为 true 时对上一路调用 <see cref="LeviathanVideoDecoderBase.Stop"/></param>
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public void ActivateDecoder(LeviathanVideoDecoder decoder, bool stopPreviousDecoder = true)
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{
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EnsureSharedMaterial();
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if (_sharedMaterial == null)
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return;
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if (_activeDecoder == decoder)
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{
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if (decoder != null)
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decoder.RefreshSharedMaterialDisplay();
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return;
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}
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if (_activeDecoder != null)
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{
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if (stopPreviousDecoder)
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_activeDecoder.Stop();
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_activeDecoder.UnbindSharedMaterialController();
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_activeDecoder = null;
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}
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if (decoder == null)
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return;
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if (decoder.AlphaType != _sharedAlphaType)
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{
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LeviathanLogConfig.LogError(nameof(LeviathanVideoSharedMaterialController),
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$"ActivateDecoder: 解码器 AlphaType={decoder.AlphaType} 与控制器 {_sharedAlphaType} 不一致，拒绝绑定。请统一 Inspector 中的 Alpha Type。");
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return;
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}
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_activeDecoder = decoder;
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_activeDecoder.BindToSharedMaterialController(this, _sharedMaterial);
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_activeDecoder.RefreshSharedMaterialDisplay();
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}
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/// <summary>解绑当前解码器并停止播放（共用材质仍保留在控制器上）。</summary>
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public void DeactivateCurrent(bool stopDecoder = true)
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{
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if (_activeDecoder == null)
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return;
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if (stopDecoder)
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_activeDecoder.Stop();
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_activeDecoder.UnbindSharedMaterialController();
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_activeDecoder = null;
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}
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private void OnDestroy()
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{
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if (_activeDecoder != null)
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{
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_activeDecoder.UnbindSharedMaterialController();
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_activeDecoder = null;
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}
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if (_sharedMaterial != null)
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{
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Destroy(_sharedMaterial);
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_sharedMaterial = null;
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}
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}
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/// <summary>
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/// 解码器销毁或主动 <see cref="LeviathanVideoDecoder.UnbindSharedMaterialController"/> 时调用，清除激活引用。
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/// </summary>
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public void NotifyDecoderReleased(LeviathanVideoDecoder decoder)
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{
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if (_activeDecoder == decoder)
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_activeDecoder = null;
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}
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}
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